Stage Compressorized Cooling – With Dead Band | Liebert TM-10098

STAGE TEMPERATURE

iCOM Controls Training and Service Manual

The example below is based on a temperature set point of 70°F with a control band length of 4°F, which is ½ of the programmed temperature proportional band value.

STAGE TEMPERATURE

Cool 1 ON	Set point plus 1°F

Cool 2 ON	Set point plus 2°F

Cool 3 ON	Set point plus 3°F

Cool 4 ON	Set point plus 4°F

Cool 4 OFF	Set point plus 3°F

Cool 3 OFF	Set point plus 2°F

Cool 2 OFF	Set point plus 1°F

Cool 1 OFF	Set point

4 Stage Compressorized Cooling – With Dead Band

Temp Set Point + (1/2 Dead Band + 1/2 Proportional Band)
Temp Set Point: 70°F
Proportional Band: 8°F			Cool 2 On		Cool 4 On
Dead Band: 2°F			Cool 2 On		Cool 4 On
Dead Band: 2°F
		Cool 1 On		Cool 3 On
70	71	72	73	74	75
DB
		Cool 2 Off		Cool 4 Off
	Cool 1 Off		Cool 3 Off
	Cool 1 Off		Increasing Temperature
			Increasing Temperature

Note: in the above example that the control band begins at the 70°F temperature set point and has a length of 5°F, which is ½ of the programmed temperature dead band value plus ½ of the programmed temperature proportional band value.

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Liebert TM-10098 service manual Stage Compressorized Cooling – With Dead Band, iCOM Controls Training and Service Manual

Contents

TM-10098:Rev. 02/06 Environmental Training and Service ManualLarge Systems iCOM Microprocessor iCOM Training & Service ManualiCOM Control Training and Service Manual Page iCOM Control Training and Service Manual Table of ContentsChapter 1 Temperature/ Humidity Control Chapter 2: Programming Functions Chapter 4: General Troubleshooting DataChapter 3: iCOM Hardware Connections iCOM Controls Training and Service Manual Electrical Schematics How To Use The SchematicsGlossary of Terms Computer and Network Terms Temperature Control Program Types Chapter Temperature and Humidity Control ProgramsCooling and/ or Heating Required, in Percent % iCOM Controls Training and Service Manual Membership iCOM Control Training and Service ManualKnowledge Base/Decision Making Consequence Proportional + Integral PI Control iCOM Controls Training and Service ManualProportional P Control Proportional + Integral + Derivative PID Control iCOM Control Training and Service Manual A suggested tuning procedure is as follows iCOM Controls Training and Service Manual iCOM Control Training and Service Manual Operations and ChartsTemperature Control Temp Set Point + 1/2 Proportional Band 2 Stage Compressorized Cooling – No Dead Band 2 Stage Compressorized Cooling – With Dead Band iCOM Control Training and Service Manual STAGECOMPRESSORS, UNLOADER STATE Temp Set Point + 1/2 Proportional Band 4 Stage Compressorized Cooling – No Dead Band STAGE TEMPERATURE iCOM Controls Training and Service Manual4 Stage Compressorized Cooling – With Dead Band As the return air temperature increases Cooling 1, lead compressor unloaded, is activated at 72F or ½ of the dead band value plus 25% of the cooling control band. If the return air temperature continues to increase Cooling 2, lag compressor unloaded, will activate at 73F or ½ of the dead band value plus 50% of the cooling control band. If the return air temperature continues to increase Cooling 3, lead compressor unloaded, is activated at 74F or ½ of the dead band value plus 75% of the cooling control band. If the return air temperature continues to increase Cooling 4, lag compressor loaded, will activate at 75F or ½ of the dead band value plus 100% of the cooling control band iCOM Control Training and Service Manual 1 compressor operation Switch 2nd iCOM Controls Training and Service ManualSwitch 1st compressor ON compressor ON Glycool at 100% Capacity – No Dead Band iCOM Control Training and Service Manual Dual Source Cooling iCOM Controls Training and Service ManualGlycool at 50% Capacity – No Dead Band Staged Electric Reheat Dual Cooling at 100% Capacity – No Dead Band Temp Set Point - 1/2 Proportional Band iCOM Controls Training and Service Manual3 Stage Electric Reheat – No Dead Band 3 Stage Electric Reheat - With Dead Band Humidity Control Program Types Humidity Control Humidity iCOM Control Training and Service ManualHumidity Proportional Humidifier Operation Operations and ChartsiCOM Controls Training and Service Manual Relative Humidity Control Humidity Set Point - 1/2 Proportional Band iCOM Control Training and Service ManualInfrared Humidification – No Dead Band Infrared Humidification – With Dead Band iCOM Controls Training and Service Manual Autoflush Control Flow Chart iCOM Control Training and Service Manual Dehumidification Operation Humid Set Point: 50% Humidity Set Point + 1/2 Proportional Band iCOM Controls Training and Service Manual Reheating during Dehumidification No Normal Delayed iCOM Controls Training and Service ManualParameterOperation Start Additional ProgramsAuto restart iCOM Control Training and Service Manual High Pressure Cutout Fan Alarm / Fan settingsSuction Pressure Transducer Call for Cooling The Startup and Freeze Protection Program iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Next Maintenance CalculationCalculation of next Maintenance Parameters The Maintenance Calculation is done as follows iCOM Control Training and Service Manual Parameters for next Maintenance CalculationGeneral Maintenance Settings Shared Parameters an understanding iCOM Control Training and Service Manual Networking and FunctionsUnderstanding the iCOM Network setup process The Basics for Cooling Unit Placement The Basics for HardwareiCOM Controls Training and Service Manual The Basic for Programming Example: Display: Example: Control Board: iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Setting ParametersUnit No. Unit No. Power iCOM Control Training and Service ManualSwitch Unit No. U2U:Switc iCOM Controls Training and Service Manual Line S802: Number units connected: xx 01 - iCOM Control Training and Service Manual iCOM Controls Training and Service Manual TeamworkTeamwork Modes “No” Teamwork iCOM Control Training and Service Manual Unit Lead/ Lag or Running/ Standby FunctionTeamwork Mode Typical Lead/ Lag Running/ Standby Function Standby & Cascade iCOM Controls Training and Service Manual iCOM Control Training and Service Manual Notes Programming Functions ChapterSmall Graphic Display with Panel Mount Bezel Optional Large Graphic Display with Panel iCOM Control Training and Service Manual iCOM Display Components and FunctionsiCOM Keyboard Layout iCOM Keyboard Layout iCOM Controls Training and Service ManualIcon Key Name iCOM Control Training and Service Manual iCOM Display Symbols/ Icons Status Display Programming Functions iCOM Control Training and Service Manual Menu Screens ICON Symbols Menu Parameters NamesLevel 2: Service Level 1: User iCOM Controls Training and Service Manual User Menu Icons and DescriptionsIcon Name C/ F Service Menu Icons and Descriptions Advanced Menu Icons and Descriptions Menu ParametersUser Menu Parameters iCOM Controls Training and Service Manual User Menu: Spare Parts List, Large Display Only DefaultUser Menu: Set Point Parameters U100 series Menu Line Default iCOM Controls Training and Service ManualUser Menu: Graphics Parameters Parameter Default User Menu: Set Alarm Parameters U200 seriesMenu Line Parameter User Menu: Active Alarms Parameters Parameter iCOM Controls Training and Service ManualUser Menu: Display Setup Parameters U400 series Default Default iCOM Control Training and Service ManualUser Menu Total Run Hours Parameters U500 series Menu Line User Menu: Service Contacts U700 series iCOM Controls Training and Service ManualMenu Line Parameter iCOM Control Training and Service Manual Service Menu ParametersDefault Menu Line Service Menu: Unit Diary Log Parameter DefaultMenu Line Parameter Default iCOM Control Training and Service ManualDefault Menu Line Default DefaultMenu Line Parameter Default iCOM Control Training and Service ManualDefault Menu Line Default iCOM Controls Training and Service ManualDefault Parameters: Page 6 of Default iCOM Control Training and Service ManualMenu Line Parameter Menu Line iCOM Controls Training and Service ManualParameter Range Menu Line iCOM Control Training and Service ManualParameter Range Service Menu Set Alarm Parameters DefaultDefault Menu Line Service Menu: Set Alarm Parameters: Page 3 of iCOM Control Training and Service ManualService Menu Set Alarm Parameters Menu Line Service Menu: Set Alarm Parameters: Page 5 of iCOM Controls Training and Service ManualService Menu Set Alarm Parameters Menu Line Menu Line iCOM Control Training and Service ManualParameter Range Default iCOM Controls Training and Service ManualDefault Menu Line Default iCOM Control Training and Service ManualDefault Menu Line Default iCOM Controls Training and Service ManualDefault Menu Line Default iCOM Control Training and Service ManualDefault Menu Line iCOM Controls Training and Service Manual Advanced Menu ParametersMenu Code Parameter Default iCOM Control Training and Service ManualDefault Menu Code Default iCOM Controls Training and Service ManualDefault Menu Code Menu Code DefaultParameter Range Menu Code DefaultParameter Range iCOM Control Training and Service Manual Events Notifications ParametersType Description Large Display iCOM Controls Training and Service Manual Events Notifications Parameters continuedType Description Large Display Events Notifications Parameters continued iCOM Control Training and Service ManualType Description Large Display Event ID number, Description and Function Events Notifications Parameters continuediCOM Controls Training and Service Manual Default LOSS OF iCOM Control Training and Service Manual HUM HRS iCOM Controls Training and Service Manual Unit COMP DIG SCROLL2 iCOM Control Training and Service Manual UNIT CODE MISMATCH iCOM Control Training and Service Manual Control Board Connections ChapterIntroduction iCOM Controls Training and Service Manual Large Disdplay Small Display LCD Display BoardiCOM Control Training and Service Manual iCOM Controls Training and Service Manual Control Board DIP Switches and Plug ConnectorsUnit Mounted Control Board iCOM Control Board DIP Switch #2 Settings iCOM Control Training and Service ManualConnector Setting iCOM Control Board Jumper Settings iCOM Controls Training and Service ManualSetting Default Setting Setting Large Display Jumper SettingsDefault Setting Small Display DIP Switch #3 Settings Small Display Jumper Settings iCOM Controls Training and Service ManualSetting Default Setting iCOM Control Training and Service Manual DS SystemsP4 24 VAC Power P8: 24 VAC Alarm Inputs P22 Glycool Valve Std. Pressure Actuator iCOM Controls Training and Service ManualP32: Compressor Devices P33: Compressor Devices P38 Smoke Detector iCOM Control Training and Service ManualP39: Firestat & Remote Shutdown P40: Basic Unit Connections P65: Optional Intelleslot Power Suplly iCOM Controls Training and Service ManualP64: Unit Large Display Digital Signals P66: Unit Small Display Digital Signals iCOM Control Training and Service Manual Fuse Board Layout: All UnitsP4: 24 VAC Power P41: 24 VAC Power iCOM Controls Training and Service Manual Temperature/ Humidity Board: All UnitsTemperature/ Humidity Assembly Housing Temperature/ Humidity Board iCOM Control Training and Service Manual NOTES Chapter General Troubleshooting DataC P U iCOM Controls Training and Service Manual Areas of Control IsolationiCOM Control Training and Service Manual iCOM Controls Training and Service Manual BASIC OPERATION OF THE TRIACSemiconductor Semiconductor Showing No Movement of Electrons Front and Left Side Views of the Triac iCOM Control Training and Service ManualSchematic Drawing for the Triac Input Opto-Isolator Basic Operation of the Opto-IsolatorOutput Opto-Isolator iCOM Control Training and Service Manual Troubleshooting the Output Opto-IsolatorOutput Opto-IsolatorPin Location OUTPUT VOLTAGE CHECK iCOM Controls Training and Service Manual Troubleshooting the Input Opto-IsolatorInput Opto-IsolatorPin Location INPUT VOLTAGE CHECK Microprocessor Control Board Alarm Input Opto-IsolatorLegendiCOM Control Training and Service Manual Opto Control Output Triac Legend Control Output Opto-IsolatorLegendiCOM Controls Training and Service Manual Opto iCOM Control Training and Service Manual iCOM Diagnostics / Service Mode Program iCOM Controls Training and Service Manual Basic Troubleshooting StepsProgramming DC Voltage check If 24 VAC is present perform the following iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Moisture Content Charts Moisture Content at Temperature = 80F 26.7ºC iCOM Control Training and Service ManualGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 79F 26.1ºC iCOM Controls Training and Service ManualGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 78F 25.6ºC iCOM Control Training and Service ManualGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 77F 25.0ºCGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 76F 24.4ºCGrains Per Cu Ft Moisture Content at Temperature = 75F 23.9ºC iCOM Controls Training and Service ManualGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 74F 23.3ºCGrains Per Cu Ft Moisture Content at Temperature = 73F 22.8ºC iCOM Controls Training and Service ManualGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 72F 22.2ºC iCOM Control Training and Service ManualGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 71F 21.7ºCGrains Per Cu Ft Moisture Content at Temperature = 70F 21.1ºC iCOM Control Training and Service ManualGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 69F 20.6ºC iCOM Controls Training and Service ManualGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 68F 20.0ºC iCOM Control Training and Service ManualGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 67F 19.4ºCGrains Per Cu Ft Moisture Content at Temperature = 66F 18.9ºC iCOM Control Training and Service ManualGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 65F 18.3ºC iCOM Controls Training and Service ManualGrains Per Cu Ft Grains Per Lb iCOM Control Training and Service Manual Suction Transducer Information Codes A124-A128 iCOM Controls Training and Service Manual Digital Scroll High Temperature Sensor ChartNTC Code S606 and S608 FACTORY SERVICE TECHNICIAN Unit Code DescriptioniCOM Control Training and Service Manual iCOM Controls Training and Service Manual Troubleshooting Checklist iCOM Control Training and Service Manual Glossary of Unit and System Parameters User MenuSet Alarms Code Display Setup iCOM Controls Training and Service ManualTimer Code Service contacts Service MenuStandby settings / Lead-lag Wellness / General Settings Fan Settings iCOM Controls Training and Service ManualCompr. 1 Settings Compr. 2 Settings Humidifier Settings El. Heater 3 SettingsDiagnostics / Service Code Set Alarms iCOM Controls Training and Service ManualCode Type System / Network Setup iCOM Control Training and Service ManualOptions Setup Code iCOM Controls Training and Service Manual Advanced MenuService contacts Factory Settings Code iCOM Control Training and Service ManualAccess iCOM Controls Training and Service Manual Glossary of Terms Hysteresis: Differential iCOM Control Training and Service Manual Input: An incoming information signal iCOM Controls Training and Service Manual Prefill: The period of time between when the water begins to fill the pan and the humidifier lamps turn on iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Computer and Network Terms Ethernet: A local-areanetwork LANarchitecture developed by Xerox Corporationin cooperation with DECand Intelin 1976. Ethernet uses a bus or star topologyand supports data transfer ratesof 10 Mbps. The Ethernet specification served as the basis for the IEEE 802.3 standard, which specifies the physicaland lower softwarelayers. Ethernet uses the CSMA/CDaccess method to handle simultaneous demands. It is one of the most widely implemented LAN standards •the type of error checking to be used iCOM Controls Training and Service Manual There are a variety of standard protocols from which programmerscan choose. Each has particular advantages and disadvantages; for example, some are simpler than others, some are more reliable, and some are faster. From a userspoint of view, the only interesting aspect about protocols is that your computeror device must supportthe right ones if you want to communicate with other computers. The protocol can be implemented either in hardwareor in software iCOM Control Training and Service Manual Understanding IP Addressing: Every computer that communicates over the Internet is assigned an IP address that uniquely identifies the device and distinguishes it from other computers on the Internet. An IP address consists of 32 bits, often shown as 4 octets of numbers from 0-255represented in decimal form instead of binary form. For example, the IP address 168.212.226.204 in binary form is: iCOM Controls Training and Service Manual iCOM Control Training and Service Manual Network InformationWhat is networking?… HUBS AND SWITCHES Twisted pair - 10baseT - UTP Cable iCOM Controls Training and Service ManualUNIT IDENTIFICATION OR ADDRESSING iCOM Control Training and Service Manual How To Use The Schematics 182769 Liebert DS iCOM Global Control 8 - 12 Ton Electrical SchematicsiCOM Controls Training and Service Manual iCOM Control Training and Service Manual